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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.81: Poster

Dienstag, 8. März 2016, 09:30–12:30, Poster B1

Growth and characterization of β-Mn-type Co₈Zn₈Mn_4−xFe_x polycrystals — •Kai Dietze, Justus Christinck, Nico Steinki, Stefan Süllow, and Dirk Menzel — Institut für Physik der Kondensierten Materie, Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany

In the ongoing research in spintronics, materials hosting magnetic skyrmions are getting more and more interesting due to the possible use of data storage and processing abilities. Generally, skyrmions are present in the magnetically ordered phase close to the ordering temperature far beneath 300 K. On the basis of their lacking inversion symmetry, some substitutes of β-Mn-type Co₁₀Zn₁₀ show promising characteristics for skyrmions above room-temperature. Lorentz transmission electron microscopy has indicated the presence of skyrmions in Co₈Zn₈Mn₄ around 345 K [1]. In our studies we focus on the crystal growth of Co₈Zn₈Mn_4−xFe_x samples and have performed a basic characterization. X-ray powder diffraction in combination with Rietveld-analysis confirms the β-Mn structure. SQUID magnetization and elevated-temperature resistivity measurements were performed in order to obtain information about the electronic and magnetic structure and specify the degree of purity.

[1] Y. Tokunaga et al., Nat. Commun. 6, 7638 (2015).